Pcv grommet from gbody parts does not fit. Autozone does not fit. Ordered one from Kirban, and for kicks ordered one from Highway Stars. Gbody invoice says PCV GROMMET. With a stretch I could fit the breather into grommet. I will be removing no more grommets from car..EVER...lol . Is there not a "breather" grommet on g body site?
Did you try squeezing the grommet in half sliding one side in then pushing the other side in with a flat head screwdriver. Then releasing. That's how I got all my grommets to go in no problem.
Update, New grommet arrived from highway stars. Installed very quick and snug. Not sure what the grommet from G body parts was made for, but not for an lc2.